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Jupiter, September 9, 2008


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#1 vomit

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Posted 09 September 2008 - 07:41 PM

Here is the latest pic of Jupiter.  The moon was right next door, but I was pretty happy with the quality.  Meade LX-90LNT (8"), using the LPI camera.  A .bmp composite of about 100 images, with some post-processing in registax.

Blatz for you all.

Tim

#2 vomit

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Posted 10 September 2008 - 07:02 PM

Here is a pic from tonight (9/10/08) right before the clouds rolled in.

#3 swholden

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Posted 11 September 2008 - 08:02 AM

Ok, why can't I get it this good?
Where are you located Vomit?
I'm in the Boston Suburbs. Are you in a better area?

Last night was clear, but you could see some turbulence in the air through the scope.

I did not use my barlow. I was able to play with the color settings and get it less red, but as for focusing? Man, what a drag!!

I'm using the newer version of Envisage, and just could not get a good focus. The magic eye focus never went near a point as described in another thread. Also, I'm using an ETX 125 PE, and a DSI (I think a DSI I).

I boxed in Jupiter, and even zoomed in on it, but the image just seemed to bounce around on the screen. Not as much as if I didn't zoom in on it. I played with the exposure, somewhere bewteen .02 and .04
I have a JMI focuser, so I was just making very minor adjustments focusing, and after about (what seemed) 2 hours, I gave up and started doing the Guide Tour.

Did get to see Messier 13 and 92, which were pretty neat. Never seen those before. :D
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#4 vomit

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Posted 11 September 2008 - 08:49 AM

One thing that works well for me is to focus on a star before moving to a planet.  I focus (electric focuser) until I get the star as small as possible.  Also I am not a fan of the barlow; as noted before I get a reddish tint like yourself and find it nearly impossible to focus.  Exposure time is usually .0221.  I use a minimum quality of 60% with about 20 in the evaluation count.  Manually set the gain & offset til I like what I am seeing.  Only once have I had "great" seeing where I really was blown away.  After stacking abou 150+ in .bmp, I process in registax.  It's art moreso than science imo.  I wish I could help you more.  Keep trying.  Post-processing in registax makes all the difference in the image.

My skies are mediocre.  If I had ambition I would go out to the country but it's hard.  I live in Escanaba, MI which is a small town, but the skies are fairly light polluted.

Best of luck, and keep us posted.

#5 swholden

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Posted 11 September 2008 - 09:12 AM

I'll try your suggestions next time.

Oh, are you placing the DSI in the eyepiece port? Or using the rear port camera port with an adapter?

I wonder if that would make a difference too.
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#6 vomit

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Posted 15 September 2008 - 01:47 PM

I'll try your suggestions next time.

Oh, are you placing the DSI in the eyepiece port? Or using the rear port camera port with an adapter?

I wonder if that would make a difference too.


I use the Meade LPI.  Not the DSI.  I would definitely avoid a barlow until you get comfortable without one.  Of all the images I have taken thus far, none with the barlow has turned out worth a pinch of dirt.  Keep trying & keep me posted.

#7 swholden

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Posted 19 September 2008 - 06:09 PM

Hey Vomit!!
How's this one?
Now this is unprocessed so I'll play around with it tomorrow by combining images, etc. But I don't think it's that bad. I'm getting there!

But just got back in the house and MAN!!! was it cold out tonight. I'm still shivering and my hands are frozen!!

Since I couldn't get a wireless connection outside, I couldn't check you suggestions, so I tried a few things of my own.
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#8 vomit

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Posted 20 September 2008 - 05:26 AM

Looks a little fuzzy.  But it may be able to be cleared up.  I am hoping that you saved the raw images as a .bmp or .tif or some such.  I do not know if registax will take a .gif file or not.  If you have it saved as a .bmp and want me to try and process it in registax, just let me know.  I am far from an expert, but it really helps out my images a lot.

Keep up the good work.

Tim

#9 swholden

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Posted 20 September 2008 - 08:38 AM

I did save all uncombined images as .bmp. I only posted as a .gif due to file size.

I'll give it a shot with Registax. I've used it once before, but deleted it. So will need to download it again.

I have a question for for ya though. You said you focus on a star first.

Is this a trial and error sort of thing? If I use Live view, I need to boost the exposure time in order to see the star. Or I try using Long Exposure. But even that was iffy.

After my Jupiter attempt last night, I thought I would try something a bit different, and tried finding M31. Which I did in the eyepiece, but never could get it in the FOV of the camera due to the constant long exp adn moving the scope.
Gave up after a while, it was just way to cold. :)
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#10 vomit

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Posted 20 September 2008 - 08:59 AM

Good luck with registax.  The more you use it, the easier it becomes (even if am not 100% sure what I am doing!).

I usually leave the esposure time at whatever Envisage has when it first boots up....honestly I've never even thought to check and see what the default is.  Slew it to a bright star (Vega say) and then I focus it until it is as sharp as I can make it.  By the time I get back to Jupiter, the focus is usually spot-on.

I tried some deep-sky objects with the LPI but so far, have had no luck.  The LPI (obviously is not meant for them anyways); if I get better at planetary imaging, I may move on to deep-sky stuff.

#11 swholden

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Posted 21 September 2008 - 03:47 AM

I do think I know why it is fuzzy.

After I was done for the evening, and started packing up, I noticed that there was a lot of due on the scope.

Now, I don't know if it was there at the time I was imaging Jupiter, but does explain why I couldn't see any dim objects very well.

Guess I need to find a dew shield now. :)

But here is what I managed to do with Registax. Nice little piece of software. It does more than I thought. I'll have to go back and see what I can due with some old Saturn images.

Anyway, here it is. And if you enlarge and brighten, you can see 3 moons (2 Rt, 1 Lt)

It's still a bit grainy for my taste, but I can see more detail than the other.
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#12 vomit

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Posted 21 September 2008 - 05:30 AM

Dew is your enemy.  Definitely get a shiled or a dew zapper.  It's that time of the year where the stuff forms readily.  Also be sure your scope has time to adjust to the ambient air if you are keeping it stored inside.

#13 swholden

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Posted 21 September 2008 - 06:04 AM

I usually take it outside about 1 hour before I plan to use it.
I'll go searching for a dew sheild.
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#14 vomit

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Posted 21 September 2008 - 08:54 AM

I do think I know why it is fuzzy.

After I was done for the evening, and started packing up, I noticed that there was a lot of due on the scope.

Now, I don't know if it was there at the time I was imaging Jupiter, but does explain why I couldn't see any dim objects very well.

Guess I need to find a dew shield now. :(

But here is what I managed to do with Registax. Nice little piece of software. It does more than I thought. I'll have to go back and see what I can due with some old Saturn images.

Anyway, here it is. And if you enlarge and brighten, you can see 3 moons (2 Rt, 1 Lt)

It's still a bit grainy for my taste, but I can see more detail than the other.


The image you posted was not visible earlier.  I have to say it looks pretty damned good.  I like it.  The monitor I am using right now is kind of junky, but when I get home I will be excited to see.  It looks good.




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